YES. But you have to keep in mind that the government was designed from the beginning with full acknowledgment of many of its flaws. For example, some people being only '3/5ths' of a person, but also the very idea of checks & balances, the bill of rights, the supreme court being UNELECTED, the house having tons of elections...
it was all made that way because they knew that the US government WOULD be flawed. There is NO getting around it, no matter what kind of government you have.
Now, as for the "calls for change" -- I see them as an empty rhetorical device. Politicians call for change because its an idea that everyone can see value in....Unfortunately, while the 'idea' of change is always an appealing part of a political movement, it is meaningless without specifics to back it up. Of course...those specifics are NOT going to be appealing to everybody, so politicians find it best to keep those quiet.
Now...delving deeper into your question...I would say that the problem is not in our government, our political policies, or our politics. It goes far deeper. Our society is going through a quiet revolution. Technology is changing how we communicate at a breakneck pace, our local cultures are constantly fighting a battle against corporate 'standardization,' and the average Joe is working more hours, spending less time with family and friends, and spending far more mental energy dealing with the plethora of choices offered by modern technology than was fathomable just fifteen or twenty years ago.
What we need are social/cultural standards to deal with modern life, a revitalization of basic social friendships/support structures, and an easy way to block out unwanted technological distractions.